Quality of intra‐ and interprovenance families of Picea abies (L.) Karst

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Abstract
Data on some 30 characters related to stem quality of intra‐ and interprovenance hybrids of Picea abies from three field trials. 20–28 years of age, are presented. In all three trials the mating design is factorial and the two earliest trials have the same 33 families. For the majority of the characters significant variation of the GCA was noted and in some cases SCA was also significant. Generally the variance components were several times larger for GCA than for SCA. The largest GCA components were noted for basic density, and the sum of the branch diameters divided by the breast height diameter. Three clones with offspring of superior quality and stem volume were identified. For most characters there was no significant difference between the two mating types, Swedish×Swedish and Swedish×central European families. A significant genotype×environment interaction was noted for several characters but the variance components were low, not exceeding 5%.

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